In a glass production process, a glass plate of 0.5 m x 2 m and 3 mm thickness is cooled by air blown at a speed of 1 m/s from both sides. Air is blown parallel to the plate. The initial temperature of the glass plate is 425 C and the temperature of the air is 200 C. Calculate the temperature of the plate after cooling for 5 minutes. Properties of glass  = 2500 kg/m3, c = 7600 J/kgK, k = 0.8 W/mK properties of air

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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In a glass production process, a glass plate of 0.5 m x 2 m and 3 mm thickness is cooled by air blown at a speed of 1 m/s from both sides. Air is blown parallel to the plate. The initial temperature of the glass plate is 425 C and the temperature of the air is 200 C. Calculate the temperature of the plate after cooling for 5 minutes.

Properties of glass
 = 2500 kg/m3, c = 7600 J/kgK, k = 0.8 W/mK
properties of air

Bir cam üretim prosesinde 0,5 m x 2 m ebatlarında ve 3 mm kalınlığında bir
cam levha her iki tarafından 1 m/s hızda üflenen hava ile soğutulmaktadır. Hava levhaya
paralel olarak üflenmektedir. Cam levhanın ilk sıcaklığı 425 °C ve havanın sıcaklığı 200
°C'dir.
Levhanın 5 dakika soğutulması sonucundaki
sıcaklığını hesaplayınız.
Camın özellikleri
p = 2500 kg/m3, c = 7600 J/kgk, k = 0.8 W/mK
Havanın özellikleri
v (m²/s)
48.33 x 106
ky (W/mK)
0,046
Pr
0,67
T= 200°C-
u = 1 m/s
p (kg/m³)
0,615
Cp = 0.76 kJ/kg. K
p=2500 kg/m³
T₁ = 425°C
2m
0.5 m
3 mm
Transcribed Image Text:Bir cam üretim prosesinde 0,5 m x 2 m ebatlarında ve 3 mm kalınlığında bir cam levha her iki tarafından 1 m/s hızda üflenen hava ile soğutulmaktadır. Hava levhaya paralel olarak üflenmektedir. Cam levhanın ilk sıcaklığı 425 °C ve havanın sıcaklığı 200 °C'dir. Levhanın 5 dakika soğutulması sonucundaki sıcaklığını hesaplayınız. Camın özellikleri p = 2500 kg/m3, c = 7600 J/kgk, k = 0.8 W/mK Havanın özellikleri v (m²/s) 48.33 x 106 ky (W/mK) 0,046 Pr 0,67 T= 200°C- u = 1 m/s p (kg/m³) 0,615 Cp = 0.76 kJ/kg. K p=2500 kg/m³ T₁ = 425°C 2m 0.5 m 3 mm
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